EP0498744A1 - Kupplungsvorrichtung zur Wegoptimierung eines mit einem Zugfahrzeug gekoppelten Anhängers - Google Patents

Kupplungsvorrichtung zur Wegoptimierung eines mit einem Zugfahrzeug gekoppelten Anhängers Download PDF

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Publication number
EP0498744A1
EP0498744A1 EP92430002A EP92430002A EP0498744A1 EP 0498744 A1 EP0498744 A1 EP 0498744A1 EP 92430002 A EP92430002 A EP 92430002A EP 92430002 A EP92430002 A EP 92430002A EP 0498744 A1 EP0498744 A1 EP 0498744A1
Authority
EP
European Patent Office
Prior art keywords
drawbar
tractor
trailer
trajectory
mobiles
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
EP92430002A
Other languages
English (en)
French (fr)
Inventor
Louis Pacchiani
Jean-Yves Heraud
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Onet SA
Original Assignee
Onet SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Onet SA filed Critical Onet SA
Publication of EP0498744A1 publication Critical patent/EP0498744A1/de
Ceased legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
    • A47L9/28—Installation of the electric equipment, e.g. adaptation or attachment to the suction cleaner; Controlling suction cleaners by electric means
    • A47L9/2836—Installation of the electric equipment, e.g. adaptation or attachment to the suction cleaner; Controlling suction cleaners by electric means characterised by the parts which are controlled
    • A47L9/2852—Elements for displacement of the vacuum cleaner or the accessories therefor, e.g. wheels, casters or nozzles
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
    • A47L9/28—Installation of the electric equipment, e.g. adaptation or attachment to the suction cleaner; Controlling suction cleaners by electric means
    • A47L9/2805—Parameters or conditions being sensed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60D—VEHICLE CONNECTIONS
    • B60D1/00—Traction couplings; Hitches; Draw-gear; Towing devices
    • B60D1/24—Traction couplings; Hitches; Draw-gear; Towing devices characterised by arrangements for particular functions
    • B60D1/42—Traction couplings; Hitches; Draw-gear; Towing devices characterised by arrangements for particular functions for being adjustable
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D13/00—Steering specially adapted for trailers

Definitions

  • the present invention relates to a connecting device for optimizing the trajectory of a trailer coupled behind a tractor.
  • the technical sector of the invention is the field of mechanical construction and more particularly trailer hitches.
  • One of the main applications of the invention is the production of articulated links between two vehicles, at least one of which is a tractor robot and the second of which is a tool-carrying trailer which must perform specific tasks along a path defined by the tractor robot,
  • the tractor robot can carry out a first operation for cleaning the surface of floors and the trailer can carry out additional cleaning operations on this same surface.
  • connection and coupling between trailers and tractors in different applications, the main ones being in the agricultural and road transport fields.
  • the most well-known link is that comprising a fixed point at the rear of the tractor and constituting an articulation at least along a vertical axis, on which is fixed the end of a drawbar or of the chassis itself carrying the trailer, and integral with an axle carrying two wheels which are then either the steering wheels of the trailer which can then pivot independently with respect to it, or the only carrying wheels of this trailer which then pivots itself with a single movement d 'together.
  • the problem posed is to produce a coupling device between two mobiles, such as a trailer and a tractor, so that the trajectory of the trailer best follows that of the tractor, and that in any event, during the maneuvers of the changes of direction, there is no interference and risk of collision between the mobiles and at best it resumes tracking straight of it, after any curve, in a very short distance.
  • connection device between two mobiles, one of which is a trailer coupled to the other which is a tractor, which device comprises a drawbar articulated at its two ends, connected on one side to the rear. from the tractor and on the other side at the front of the trailer; this rests and rolls on at least three wheels, at most two of which are in fixed planes parallel to the axis of the trailer and located laterally each on each side of the latter, and at least one is mounted loose and free in direction ; in the present invention at least the said articulation at the end of the drawbar on the tractor is mounted on any means making it possible to voluntarily modify the angle which the drawbar makes with the axis of the tractor
  • said drawbar end articulation on the trailer is mounted on a means identical to that on which the articulation of the other end is mounted to allow the angle that is made to be voluntarily modified. the drawbar with the axle of the trailer.
  • said means for modifying the angle of the drawbar relative to the axes of the mobiles is a translation system allowing lateral movement, towards one side or the other of the mobile concerned, of the articulated end of the drawbar and corresponding to this mobile.
  • the device according to the invention preferably comprises at each end of the drawbar a measurement sensor angles made by the drawbar with the axes of the mobiles, and a calculation unit on board one of these mobiles which is programmed to control the means for modifying these angles, as a function of the trajectory of the tractor, in order to obtain a trajectory wanted from the trailer.
  • the trajectory of the trailer can then be determined, thanks to the device according to the invention such that if it deviates from that of the tractor during a change of direction thereof, it is towards the outside of the change of direction curve, and the trajectories of the two mobiles meet at best at the point where the tractor has resumed a straight trajectory.
  • the tractor robot can be a cleaning robot making it possible to follow a given known and / or learned and / or programmed and / or remote controlled trajectory, such that the entire surface to be cleaned is effectively traversed by a minimum of passages and maneuvers: the trailer can then be a carrier of additional cleaning tools which must absolutely pass, during the same passage, over the same places as those treated by the tools of the robot tractor; the connecting device according to the invention achieves this objective.
  • Figure 1 is a schematic bottom view of a tractor and its trailer.
  • Figure 2 is an exemplary embodiment of the coupling connection device.
  • Figure 3 is another embodiment of a coupling connection device.
  • FIG. 1 is a bottom view schematically showing a tractor 1 pulling a trailer 2 by means of a link or hitch consisting of a drawbar 3, fixed by articulations 6 respectively to the tractor 1 and 7 to the trailer 2: it rests and rolls on at least three wheels 4 and 5, two of which 41 and 42 at most are in fixed planes parallel to the axis XX ′ of this trailer 2 and located laterally each on each side thereof; at least one of these wheels 5 is mounted loose and free in direction: in the figure, this is represented in the axis XX ′ of the trailer but in other embodiments, it is possible to envisage two idle wheels of this type placed laterally like the wheels 41 and 42 or can be located one at the front and the other at the rear. In other embodiments, it can be envisaged that all the wheels 4, 5 of the trailer are mounted idly in direction and in rotation.
  • the tractor 1 which can be a robot, of the cleaning robot type, but which can also be a road tractor, or a tractor for towing loads in a workshop, or the like, follows a path C, controlled or programmed, by means of a or steerable wheels 16 and drive wheels of any known type.
  • the trailer 2 thus pulled by the drawbar 3 follows a trajectory T which, if the articulations 6 and 7 were free, as in most of the existing systems, would be a trajectory cutting inside the curve C and not passing to the exterior as shown in this figure 1.
  • the device according to the invention comprises at least said articulation 6 at the end of the drawbar 3 on the tractor 1, mounted on any means 8, 12 shown in FIGS. 2 and 3 making it possible to voluntarily modify the angle ⁇ made by the drawbar 3 with the axis YY ′ of the tractor 1.
  • This type of device at least at the articulation 6 of the tractor 1 makes it possible to give an optimum lateral offset thanks to this angle ⁇ which is calculated and imposed by the device, and which obliges the trailer to better follow the tracks of the tractor 1 and thus rejoin the trajectory C of the tractor as quickly as possible after any possible curve of this trajectory.
  • said articulation 7 at the end of the drawbar 3 on the trailer 2 can be mounted on means 9, 13 identical to that on which the articulation 6 at the other end is mounted to allow the angle ⁇ to be modified voluntarily. that the drawbar 3 does with the axis XX ′ of the trailer 2. This makes it possible to offset the trailer even more, if necessary, when cornering in order to avoid collisions with the tractor.
  • Two specific embodiments are described in Figures 2 and 3 and each allows different guides. That shown in Figure 2, will preferably be described and claimed in the context of the objectives of the present invention.
  • FIG. 2 thus represents means for modifying the angles of the drawbar 3 with respect to the axes XX ′ and YY ′ of the mobiles 1 and 2, each comprising a translation system 8, 9 allowing lateral movement, towards a side or the other of the mobile concerned, of the corresponding articulated end of the drawbar 3.
  • This translation system 8,9 preferably comprises, integrally with the mobile concerned, an endless screw rotating on itself and a motorized drive 10,11 at one of these ends; integrally with the corresponding end of the drawbar 3, the articulation 6,7 comprises a part pierced and threaded to cooperate with said endless screw to be driven on one side or the other of the mobile according to the direction of rotation of the latter. this.
  • the movement of the translation system 9 of the trailer 2 must be in contrast to that of the tractor 8.
  • the device can include at each end of this drawbar 3 a sensor 14.15 for measuring the angles ⁇ ⁇ made by the drawbar 3 with the axes of the mobiles YY ′ and XX ′ respectively as defined above, and a calculation unit on board the one of these mobiles which is programmed to control the means 8, 9 for modifying these angles, as a function of the path C of the tractor 1 to obtain a desired path T of the trailer 2.
  • the tractor 1 is a robot which follows a path C learned or controlled or deduced from different external information
  • said calculation unit then having in memory the forecast of said path C can control in advance said means 8 and 9 for modifying drawbar angles 3: this can in particular allow the trajectory C of the trailer to be such that at least a given part of the projected surface on the ground of the trailer 2 covers and passes permanently above the surface of the ground on which a given part of the surface projected onto the ground of the tractor 1 has already passed. This is especially advantageous and necessary in the cases of application to cleaning operations but also in the case of maneuvers in congested places.
  • Tests have been made on maneuvers learned and modeled mathematically, using any means known to a person skilled in the art and any person skilled in the art, and have made it possible to effectively obtain the desired results regardless of the objectives set previously defined by to the means and devices according to the invention.
  • FIG. 3 represents another device according to the invention in which a drawbar 3 of variable length is envisaged linked in rotation to the tractor 1 and to the trailer 2 by toothed sectors 12 and 13, motorized by voluntary rotation systems 10 and 11 each secured respectively to tractor 1 and trailer 2.
  • This solution blocks and eliminates any degree of freedom between the trailer and the tractor unlike the device in FIG. 2 since in fact the two original mobiles which form an articulated system with a degree of freedom are transformed into a single mobile with geometry variable.
  • Said means for modifying the angles of the drawbar 3 with respect to the trajectories C and T are then systems 12, 13 of rotation of the end concerned making it possible to directly orient the drawbar 3 of the desired angles ⁇ and ⁇
  • These systems 12, 13 of drawbar end rotation 3 also comprise a toothed sector, integral with each end and a motorized drive 10, 11, of the sector integral with the mobile concerned. All the characteristics of the means for measuring angles, calculation unit and tracking of path imposed on the trailer 2, as described in the device of FIG. 2, apply and are used in this device of FIG. 3, except of course with regard to the means to achieve this.
  • This solution of FIG. 3 has drawbacks of having more organs to be motorized and controlled and the design of a drawbar of variable length is more complicated, as said previously, than that of a simple drawbar and therefore consumes more energy.
  • this solution makes it possible to determine a learning program which makes the trailer pass exactly in the tracks of the tractor, even if this is at the cost of additional energy expenditure.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transportation (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Regulating Braking Force (AREA)
EP92430002A 1991-02-08 1992-02-06 Kupplungsvorrichtung zur Wegoptimierung eines mit einem Zugfahrzeug gekoppelten Anhängers Ceased EP0498744A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9101788 1991-02-08
FR9101788A FR2672547B1 (fr) 1991-02-08 1991-02-08 Dispositif de liaison pour optimiser la trajectoire d'une remorque attelee derriere un tracteur.

Publications (1)

Publication Number Publication Date
EP0498744A1 true EP0498744A1 (de) 1992-08-12

Family

ID=9409736

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92430002A Ceased EP0498744A1 (de) 1991-02-08 1992-02-06 Kupplungsvorrichtung zur Wegoptimierung eines mit einem Zugfahrzeug gekoppelten Anhängers

Country Status (2)

Country Link
EP (1) EP0498744A1 (de)
FR (1) FR2672547B1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29611664U1 (de) * 1996-07-04 1996-09-26 Halder, Berthold, 88339 Bad Waldsee Mobile Stammholz-Entrindungsvorrichtung

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1842129A (en) * 1930-06-26 1932-01-19 Thomas Emil Steering device for trailers attached to motor vehicles
US2823929A (en) * 1954-05-31 1958-02-18 Sarl M I C Mecanique Ind Chimi Truck steering hitch
US4153132A (en) * 1977-08-18 1979-05-08 Biedebach Lawrence W Trailer steering and towing hitch
FR2589812A1 (fr) * 1985-11-12 1987-05-15 Senelet Bernard Dispositif d'articulation perfectionne pour vehicule
DE3831492C1 (de) * 1988-09-16 1989-12-21 Adam Opel Ag, 6090 Ruesselsheim, De

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1842129A (en) * 1930-06-26 1932-01-19 Thomas Emil Steering device for trailers attached to motor vehicles
US2823929A (en) * 1954-05-31 1958-02-18 Sarl M I C Mecanique Ind Chimi Truck steering hitch
US4153132A (en) * 1977-08-18 1979-05-08 Biedebach Lawrence W Trailer steering and towing hitch
FR2589812A1 (fr) * 1985-11-12 1987-05-15 Senelet Bernard Dispositif d'articulation perfectionne pour vehicule
DE3831492C1 (de) * 1988-09-16 1989-12-21 Adam Opel Ag, 6090 Ruesselsheim, De

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
ENGINEERING vol. 229, no. 6, Juin 1989, LONDON GB CIRCLE 201: 'robot vehicle copes with the cleaning' *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29611664U1 (de) * 1996-07-04 1996-09-26 Halder, Berthold, 88339 Bad Waldsee Mobile Stammholz-Entrindungsvorrichtung

Also Published As

Publication number Publication date
FR2672547A1 (fr) 1992-08-14
FR2672547B1 (fr) 1995-09-29

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